40020244 has 24 divisors (see below), whose sum is σ = 80898048. Its totient is φ = 17120640.

The previous prime is 40020221. The next prime is 40020257. The reversal of 40020244 is 44202004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26004 + ... + 27499.

It is an arithmetic number, because the mean of its divisors is an integer number (3370752).

Almost surely, 2^40020244 is an apocalyptic number.

40020244 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40020244 is an abundant number, since it is smaller than the sum of its proper divisors (40877804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40020244 is a wasteful number, since it uses less digits than its factorization.

40020244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53535 (or 53533 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 40020244 is about 6326.1555466176. The cubic root of 40020244 is about 342.0528741934.

Adding to 40020244 its reverse (44202004), we get a palindrome (84222248).

The spelling of 40020244 in words is "forty million, twenty thousand, two hundred forty-four".